//
//  MainTabBar.swift
//  Sina
//
//  Created by 王杰 on 15/11/8.
//  Copyright © 2015年 王杰. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {

    override init(frame: CGRect) {
        super.init(frame: frame)
        setUpUI()
    }

    required init?(coder aDecoder: NSCoder) {
//        fatalError("init(coder:) has not been implemented")
        super.init(coder: aDecoder)
        setUpUI()
    }

    private func setUpUI(){
    
    addSubview(composeBtn)
    
    
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        let w = self.bounds.width/5
        let h = self.bounds.height
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        
        var index: CGFloat = 0
        
        for subView in subviews {
        
            if subView.isKindOfClass(NSClassFromString("UITabBarButton")!) {
            
            subView.frame = CGRectOffset(rect, index * w, 0)
            
                 index += index == 1 ? 2:1
            }
        }
        
        composeBtn.frame = CGRectOffset(rect, w * 2, 0)
        bringSubviewToFront(composeBtn)
    }
    
    
    //MARK: 懒加载
lazy var composeBtn: UIButton = {
    let btn = UIButton()
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
        btn.sizeToFit()
        
        return btn
    
    }()
}












